Punters have been piling money on Andy Murray to defeat Marian Cilic in the third round of the Madrid Masters.
Britain's top tennis player was gifted a second round victory when Italy's Simone Bollelli retired injured in the early stages of the second set.
Murray had already taken the first 6-0, but he is likely to face a tougher test against Cilic, who took him to five sets in their only previous encounter.
Despite the potential for a slip-up, the US Open runner-up has been backed in to 4/11 with William Hill.
Rupert Adams, spokesman for the bookmaker, said: "Andy has been very popular all day and we are in [for a] testing few days if he plays to his best."
Skybet offers 10/3 that the Scotsman will lose to Cilic and also 10/3 that he will head home after the quarter-final.
Optimistic Murray fans can back him at 40/1 to win both the current event and the Paris Masters at Skybet.
World number one Rafael Nadal and his great rival Roger Federer remain 9/4 joint favourites to triumph in Madrid.
Punters have been piling money on Andy Murray to defeat Marian Cilic in the third round of the Madrid Masters.